Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.awt.event.KeyEvent;
import java.lang.reflect.Field;

import javax.swing.AbstractButton;

public class Main {
    /** 
     * Uses the value returned via the component's getText() method to set a Mnemonic key.
     * The character following the first '&' charcater is used as Mnemonic key,
     * but this only works for characters in the range a..Z
     * If a Mnemonic key is found, the '&' character is removed from the text.
     * @param textComponent
     */
    public static void setMnemonic(AbstractButton textComponent) {

        String label = textComponent.getText();
        if (label == null || label.isEmpty() || !label.contains("&") || label.indexOf('&') == label.length() - 1) {

            return;
        }
        char ch = label.charAt(label.indexOf('&') + 1);
        if (!Character.isLetter(ch)) {
            return;
        }
        int ke = getKeyEvent(ch);
        if (ke != Integer.MIN_VALUE) {
            label = label.substring(0, label.indexOf('&'))
                    + label.substring(label.indexOf('&') + 1, label.length());
            textComponent.setText(label);
            textComponent.setMnemonic(ke);
        }
    }

    /** 
     * Returns the KeyEvent-code (only for VK_a..Z).
     * If no key-event could be found, {@link Integer#MIN_VALUE} is returned. 
     */
    public static int getKeyEvent(Character ch) {

        int ke = Integer.MIN_VALUE;
        try {
            Field f = KeyEvent.class.getField("VK_" + Character.toUpperCase(ch));
            f.setAccessible(true);
            ke = (Integer) f.get(null);
        } catch (Exception e) {
        }
        return ke;
    }
}